Method and apparatus for improving quality of service in communication system

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a base station in a communication system is provided. The method includes receiving a packet including metadata from a user plane function (UPF), identifying a packet delay budget (PDB) for a quality of service (QoS) flow of the packet, identifying a delay time of the packet based on the metadata, determining an access network (AN) PDB based on the PDB and the delay time, and performing scheduling for transmission of the packet to a terminal based on the AN PDB.

What is claimed is: 
     
         1 . A method performed by a base station in a communication system, the method comprising:
 receiving a packet including metadata from a user plane function (UPF);   identifying a packet delay budget (PDB) for a quality of service (QoS) flow of the packet;   identifying a delay time of the packet based on the metadata;   determining an access network (AN) PDB based on the PDB and the delay time; and   performing scheduling for transmission of the packet to a terminal based on the AN PDB.   
     
     
         2 . The method of  claim 1 , further comprising:
 identifying whether the metadata includes information related to a data network packet delay (DN PD),   wherein the metadata includes information related to a core network packet delay (CN PD),   wherein, in case that the metadata includes the information related to the DN PD, the delay time is determined based on the PDB, the DN PD, and the CN PD, and   wherein, in case that the metadata does not include the information related to the DN PD, the delay time is determined based on the PDB and the CN PD.   
     
     
         3 . The method of  claim 2 , further comprising:
 identifying a CN PD budget (PDB) corresponding to the PDB;   identifying whether the CN PD exceeds the CN PDB; and   transmitting a telemetry rate control message to a network device performing a control plane network function,   wherein, in case that the CN PD exceeds the CN PDB, information for requesting an increase in a telemetry frequency is included in the telemetry rate control message, and   wherein, in case that the CN PD is equal to or less than the CN PDB, information for requesting a decrease in the telemetry frequency is included in the telemetry rate control message.   
     
     
         4 . The method of  claim 1 , further comprising:
 adding the metadata to a transmission control protocol/user datagram protocol (TCP/UDP) header of the packet.   
     
     
         5 . The method of  claim 2 ,
 wherein, in case that the metadata includes the information related to the DN PD, the PDB corresponds to an end-to-end PDB, and   wherein, in case that the metadata does not include the information related to the DN PD, the PDB corresponds to an upper limit of a delay time between the terminal and the UPF.   
     
     
         6 . A method performed by a user plane function (UPF) in a communication system, the method comprising:
 receiving a packet from a data network (DN);   identifying whether the packet includes information related to a DN packet delay (PD);   inserting metadata into the packet; and   transmitting the packet with the inserted metadata to a base station.   
     
     
         7 . The method of  claim 6 , further comprising:
 in case that the packet includes the information related to the DN PD, identifying whether the DN is a trusted DN based on a source internet protocol (IP) address included in the packet; and   in case that the DN is the trusted DN, copying and inserting the information related to the DN PD into a header of the packet,   wherein the header of the packet is a general packet radio service (GPRS) tunneling protocol-user plane (GTP-U) header.   
     
     
         8 . The method of  claim 7 , wherein, in case that the DN is not the trusted DN, the information related to the DN PD is not inserted into the header of the packet. 
     
     
         9 . The method of  claim 8 , wherein the information related to the DN PD is associated with an in-band network telemetry function (INTF) of a control plane network function. 
     
     
         10 . The method of  claim 6 ,
 wherein the metadata is used to identify a core network (CN) PD, and   wherein the CN PD and the DN PD are used to identify an access network (AN) PD budget (PDB), which is used to schedule the packet by the base station.   
     
     
         11 . A base station in a communication system, the base station comprising:
 a transceiver; and   at least one processor coupled with the transceiver and configured to:
 receive a packet including metadata from a user plane function (UPF), 
 identify a packet delay budget (PDB) for a quality of service (QoS) flow of the packet, 
 identify a delay time of the packet based on the metadata, 
 determine an access network (AN) PDB based on the PDB and the delay time, and 
 perform scheduling for transmission of the packet to a terminal based on the AN PDB. 
   
     
     
         12 . The base station of  claim 11 ,
 wherein the processor is further configured to identify whether the metadata includes information related to a data network packet delay (DN PD),   wherein the metadata includes information related to a core network packet delay (CN PD),   wherein, in case that the metadata includes the information related to the DN PD, the delay time is determined based on the PDB, the DN PD, and the CN PD, and   wherein, in case that the metadata does not include the information related to the DN PD, the delay time is determined based on the PDB and the CN PD.   
     
     
         13 . The base station of  claim 12 ,
 wherein the processor is further configured to:
 identify a CN PD budget (PDB) corresponding to the PDB, 
 identify whether the CN PD exceeds the CN PDB, and 
 transmit a telemetry rate control message to a network device performing a control plane network function, 
   wherein, in case that the CN PD exceeds the CN PDB, information for requesting an increase in a telemetry frequency is included in the telemetry rate control message, and   wherein, in case that the CN PD is equal to or less than the CN PDB, information for requesting a decrease in the telemetry frequency is included in the telemetry rate control message.   
     
     
         14 . The base station of  claim 11 , wherein the processor is further configured to add the metadata to a transmission control protocol/user datagram protocol (TCP/UDP) header of the packet. 
     
     
         15 . The base station of  claim 12 ,
 wherein, in case that the metadata includes the information related to the DN PD, the PDB corresponds to an end-to-end PDB, and   wherein, in case that the metadata does not include the information related to the DN PD, the PDB corresponds to an upper limit of a delay time between the terminal and the UPF.   
     
     
         16 . A user plane function (UPF) in a communication system, the UPF comprising:
 a transceiver; and   at least one processor coupled with the transceiver and configured to:
 receive a packet from a data network (DN), 
 identify whether the packet includes information related to a DN packet delay (PD), 
 insert metadata into the packet, and 
 transmit the packet with the inserted metadata to a base station. 
   
     
     
         17 . The UPF of  claim 16 ,
 wherein the processor is further configured to:
 in case that the packet includes the information related to the DN PD, identify whether the DN is a trusted DN, based on a source internet protocol (IP) address included in the packet, and 
 in case that the DN is the trusted DN, copy and insert the information related to the DN PD into a header of the packet, and 
   wherein the header of the packet is a general packet radio service (GPRS) tunneling protocol-user plane (GTP-U) header.   
     
     
         18 . The UPF of  claim 17 , wherein in case that the DN is not the trusted DN, the information related to the DN PD is not inserted into the header of the packet. 
     
     
         19 . The UPF of  claim 18 , wherein the information related to the DN PD is associated with an in-band network telemetry function (INTF) of a control plane network function. 
     
     
         20 . The UPF of  claim 16 ,
 wherein the metadata is used to identify a core network (CN) PD, and   wherein the CN PD and the DN PD are used to identify an (AN) PD budget (AN PDB), which is used to schedule the packet by the base station.